The silicon PV group
In the Silicon PV Group at PVcomB we develop silicon-based solar cells with the focus on industrial applicable materials and processes. Based on our strong background in thin-film technology, we are currently mainly active in the Technology Fields:
- Silicon heterojunction solar cells (Fig. 1, Fig. 2)
- Thin-film silicon solar cells & modules based on a-Si:H and µc-Si:H (Fig. 3, Fig. 4)
We develop and maintain Baseline Processes as robust platforms to facilitate excellent reproducibility for reaching high device performance. Most importantly, we utilize (partially) automated, high-throughput, industrial-type equipment operated by highly-skilled and experienced engineers and scientists. By this we offer top-level industrial research as well as technology transfer to industry. Processing is possible on a maximum sample size of 30 x 30 cm² (glass) and 156 x 156 mm² (Si wafer).
- Plasma-Enhanced Chemical Vapor deposition (PECVD) Cluster Tool (AKT1600 from Applied Materials) for various amorphous and nanocrystalline silicon and silicon alloys
- In-line DC Sputter tool (A600V7 from Leybold Optics, now: Bühler) for various TCOs and Metals
- Screen Printer (Baccini) for silver grid metallization and patterning processes
- Wet benches and glass washers for glass and wafer cleaning as well as wafer texturing
- Laser-patterning system with ns- and ps-pulsed laser sources in collaboration with the HTW.
Topics & Applications:
- Industrial silicon heterojunction solar cells with high efficiency
- Silicon heterojunction solar cells for application as bottom cell in high-efficiency multi-junctions, e.g. with perovskite top cells.
- Industrial thin film silicon solar cells and modules (in cooperation with industry partners)
- Advanced silicon-based passivating contact layers for novel types of silicon-based solar cells, such as liquid-phase crystallized silicon (LPC-Si) solar cells on glass.
- Silicon heterojunction and thin-film silicon solar cells for hydrogen generation.
- Industrial compatible processes for all-rear-contacted (IBC) silicon heterojunction solar cells.
Example Cooperation Projects:
- Internal collaboration at HZB with the Institute of silicon photovoltaics (EE-IS) on silicon heterojunction solar cells and with Young investigator Groups on Perovskite/Silicon Tandems
- Within the national BMWi project Hera with Meyer Burger Germany and others on advanced, industrial silicon heterojunction solar cells and modules.
- With Sunpartner Technologies on thin-film silicon solar cells for application in Wysips® Technology, such as displays, watches, etc.
Nanocrystalline silicon emitter optimization for Si‐HJ solar cells: Substrate selectivity and CO2 plasma treatment effect, L. Mazzarella, S. Kirner, O. Gabriel, S.S. Schmidt, L. Korte, B. Stannowski, B. Rech, R. Schlatmann, physica status solidi (a) Volume 214, Issue 2 1532958 (2017). DOI: 10.1002/pssa.201532958.
Emitter Patterning for Back-Contacted Si Heterojunction Solar Cells Using Laser Written Mask Layers for Etching and Self-Aligned Passivation (LEAP), Sven Ring, Simon Kirner, Christof Schultz, Paul Sonntag, Bernd Stannowski, Lars Korte, and Rutger Schlatmann, IEEE JOURNAL OF PHOTOVOLTAICS, VOL. 6 (4) (2016). DOI 10.1109/JPHOTOV.2016.2566882.
Resolving the nanostructure of plasma-enhanced chemical vapor deposited nanocrystalline SiOx layers for application in solar cells, M. Klingsporn, S. Kirner, C. Villringer, D. Abou-Ras, I. Costina, M. Lehmann, B. Stannowski,
Journal of Applied Physics 119 22 223104 (2016). DOI: 10.1063/1.4953566.
Wafer surface tuning for a-Si:H/μc-Si:H/c-Si triple junction solar cells for application in water splitting,
Simon Kirner, Hoora Sarajan, Anahita Azarpira, Thomas Schedel-Niedrig, Bernd Stannowski, Bernd Rech, Rutger Schlatmann, Energy Procedia 102 126 – 135 (2016). DOI: 10.1016/j.egypro.2016.11.327.
Quadruple-junction solar cells and modules based on amorphous and microcrystalline silicon with high stable efficiencies, Simon Kirner, Sebastian Neubert, Christof Schultz, Onno Gabriel, Bernd Stannowski, Bernd Rech and Rutger Schlatmann, Japanese Journal of Applied Physics, Volume 54, Number 8S1 (2015). DOI: 10.7567/JJAP.54.08KB03.
Hybrid Organic/Inorganic Thin‐Film Multijunction Solar Cells Exceeding 11% Power Conversion Efficiency,
S. Roland, S. Neubert, S. Albrecht, B. Stannowski, M. Seger, A. Facchetti, R. Schlatmann, B. Rech,
D. Neher, Advanced Materials 27 7 1262-1267 (2015). DOI: 10.1002/adma.201404698.
P-type microcrystalline silicon oxide emitter for silicon heterojunction solar cells allowing current densities above 40 mA/cm², L. Mazzarella, S. Kirner, B. Stannowski, L. Korte, B. Rech, R. Schlatmann, Applied Physics Letters 106 2 23902 (2015). DOI: 10.1063/1.4905906.
Improved conversion efficiency of a‐Si: H/µc‐Si: H thin‐film solar cells by using annealed Al‐doped zinc oxide as front electrode material, S. Neubert, M. Wimmer, F. Ruske, S. Calnan, O. Gabriel, B. Stannowski, R. Schlatmann, B. Rech, Progress in Photovoltaics: Research & Applications 22 (12) 1285-1291 (2014). DOI: 10.1002/pip.2389.
Achievements and challenges in thin film silicon module production, B. Stannowski, O. Gabriel, S. Calnan, T. Frijnts, A. Heidelberg, S. Neubert, S. Kirner, S. Ring, M. Zelt, B. Rau, J.-H. Zollondz, H. Bloess, R. Schlatmann, B. Rech, Solar energy materials and solar cells 119 196-203 (2013). DOI: 10.1016/j.solmat.2013.06.043.
An overview about all publications of PVcomB is availabe here.